Patent US2870494A successfully refreshed from Google Patents.
US2870494A
Expired / Lapsed
US
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Removable window sash and a springchannel combination therefor
Assignee: Individual
•
Filing: 1954-04-28
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Granted: 1959-01-27
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Expires: 1974-04-28
Abstract
No abstract record available.
Inventors
- 👤 Gordon W Love
- 👤 Charles A Pelizzari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:59
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/34; E06B3/42; E06B3/44; E06B2003/4438; E06B2003/4446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2264020A
Cited
US2545902A
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US2677156A
Cited
US2774997A
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US2668990A
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US2667671A
Cited
US2747219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |